Adjustable shore



Juni: l0, 1930. H, J. BAKER v 1,762,567

ADJUSTABLE SHORE Filed Sept. 8, 1927 2 Sheets-Sheet l www @Honing June 1o, 1930. H. J. BAKER 1,762,567

ADJUSTABLE SHORE *Filed Sept. 8, 1927 Z'Sheets-Sheet .2

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Patented une 10, 1939 Unirse.

TATES ATENT OFFICE ADJUSTABLE srronn Application filed September 8, 1927. Serial No. 218,636.

My invention is concerned with shores or adjustable braces of the kind frequently e1n ployed to support the forms used in poured concrete building construction. It is the 5 objectoi" my invention to produce an adj ustable shore Whiclnvvhile light in Weight, Will be strong enough to sustain the loads to which it is subjected in use. A further object of my invention is to produce a shore in `which the locking device, Which holds the shore extended against the sustained load7 will be simple in construction and positive in operation. A still further objectof my invention is to produce a shore of the type described which Will be durable.

l accomplish the above objects by constructing my shore of inner and outer telescopingparts, the inner part preferably being a rectangular timber and the outer part conveniently being formed of four longitudinally etending pieces of angle iron or other suitable structural shapes interconnected and disposed at the corners of t-he inner member to tornir a hollow base .Within which the inner member is longitudinally slidable. Movable with one of these shore parts, desirably the inner shore part, Ilprovide one or more dogs which co-operate With the corner members vforming the outer short part to holdv the shore extended against the load Which it sustains.

The accompanyingdrawings illustrate my invention: Fig. 1 isa ragmental longitudinal section through a shore embodying my invention; Fig. 21s another longitudinal section' on the line 2 2 of Fig, 1; Figs. 3 and 4 are transverse .sections respectively on the lines 3 3 and 4 4 of Fig. 1; Fig. 5 is a perspective viewl of the movable cross brace which is 'embodied in the construction illustrated in Figs. 1 to 4 inclusive; Fig. 6 is a perspective view, of the support for the dogs and movable cross brace; Fig. 7 is a longitudinal section on the linev 7 7 Yof F igf8 showing a modification of my invention 'Fiom 43 8 is a transverse section on the line 8 8 of Fig. 7 and Fig. 9 is a fragmental longitudinal section illustrating a further modification ot my invention.

ln the construction illustrated in the drawings, the shore comprises tWO telesooping parts, an inner member 15 Which may be conveniently a tiinberoi rectangular cross section and an outer member desirably formed of tour angle irons 16 which are disposed at the corners ot the timber 1K5 and are rigidly interconnected and braced as by means of one or more straps 17.y rIhe four angles 16 form a hollow base Within which the timber 15 is longitudinally slidable. Movable With the timber 15 in the base 'formed by the angles 16 is a dog support 18A having tivo depending ears 19' between Awhich there extends a rod or shaft Opadapte'd to carry a pair of dogs 21. These dogs 21am desirablyU-shaped as is evident from Fig.` 4. The parallel legs of each of the U-shaped dogs terminate in sharp edges 22 adaptedto engage the inner surface ofthe angles 16, While the intermediate leg 23 may serve as a counter-Weight tending to rotate the dog about the shaft 2O in a direction to causeengagement ot theA edges 22 with theinner faces of the angles 16.

Also connected to the dog support 18 is a movable cross tie 25 Which is desirably mounted on the shaft or rod 20. T his cross tie 25 entends t ansversely of the shore-base and projects outwardly beyond Iopposite pairs of the angles 16 where it is provided withtransverse'fianges 26 lying against the outer faces oi' thoselegs ot the angle 'irons which are engaged by the dogs 21. These flanges 26,' by reason of their engagement. with the'outer faces of the angles 16,' prevent any outward boiving of such angles under the distorting influence cause'dbyv the outward pressureot the sharp edges 22 of the dogs.

Desirably, although 'not necessarily, the dog carrier or support 1S is not directly connected to thel timber 15. Instead, I may conneet the dog ycarrier 18 lto the timber 1,5 through a meansivhich will permit vrelative longitudinal movement of the timber and carrier 18, as the possibility of such movenient will facilitate release ot the dogs When it desired to collapse the shore. To this end, 1 provide between the upper surface of the dog support 18 and'bottom face of the timber 15 a pair of complementarilytapered Wedges 28 as is clear from Fig. 1. If desired, these Wedges may be provided With parallel Ito slots 29 through which there passes a link 30 which serves to interconnect the wedges without interfering with their relative movement. To connect the lower wedge 28 with the dog carrier 18, I may provide a screw 31 which extends into the lower face of the wedge 28 through a slot 32 in the dog carrier 18. Desirably, I provide the lower end ofthe timber 15 with a plate 33 which serves to protect it from injury. The lower face of the plate 33 and the upper face ofthe dog carrier 18may be provided with spaced flanges 34 which serve as guides for the wedges 28.

For the purpose of adjustably extending the shore, I may provide the extending or raising mechanism illustrated in Fig. 1. This comprises a fulcrum piece 35 having a groove 36 adapted to receive within it a leg of one of the angles 16. The groove 36 is somewhat wider than the thickness of the angle flangewhich is received within it, thus permitting the part 35 to be tilted relative to the angle 16 to cause the ends of the lside walls of the groove 36 to bite into the angle iron to prevent movement of the fulicrum piece 35 along the angle. To the fulcrum piece 35is pivotally connected a raising lever 37, the shorter arm of which has mounted on ita thrust member 38 adapted to bear against downwardly projecting bosses 39 on the dogs In operation, the two wedges 28 are first placed approximately in the position illustrated in Fig. 1, and the shore is then extended to the desired length by the extending or raising means shown or by any other means. In the operation of the elevating means illustrated in Fig. 1, it will be evident that depressing the outer end of the lever 37 will cause an upward movementI of the timber 15 together with all the locking mechanism. It is to be noted that in this operation the reaction at the fulcrum of the 'lever 37 tends to tilt the fulcrum piece 35 thus causing it to be locked .to the angle'16 with which it is engaged. The thrust member 38 bearing on the lugs 39 tends to force the sharp edges 22 of the dogs 21 into engagement with the inner faces of the angle 16, thus insuring immediate locking ofthe dogs when the upward force exerted on them is released. When the shore isextended to the desired degree, the sharp edges '22 of the dogs are held in engagement with the inner faces of the angles, and any load which is applied to thenpper end of the timber 15 increases the outward forcewith which the dogs bear against the angles.

`When Ait is desired to collapse the shore, the two wedges 28 may be driven inwardly to permit the dog carrier 18 and dogs 21 to be raised without increasingthe overall length of the shoe. This raising of the dog carrier 18 facilitates disengagement of the vsharp edges 22 of the dogs from the angles 16 and permits the shoe to be readily collapsed.

The wedges 28 may be eliminated, the inner member 15 resting directly7 on the dog carrier 18. The shore may then be collapsed by tapping the upper end of the dogs with a hammer orother tool preferably on vthe intermediate leg 23.

In Figs. 7 and 8, I have shown a modificay tion of my invention infwhich the dog carrier' f 18 and the wedges 28 are eliminated. In this device, the dogs 42 are pivotally mounted on a transverse shaft 43 carried by the movable cross brace 25.V In the modification of my invention illustrated in Figs. 7 and 8, instead of providing a single pair of dogs, yI

provide two pairs which are mounted on opk vpositesides of the brace 25 as is clear from Fig. 8. The lower ends of these dogs bear against the inner faces of the angles 16 as do the corresponding edges of the dogs 21 shown v in-Figs. 1 to 4 inclusive. c The upper ends or the dogs 42, instead of merely serving as counterweights, kbear directly against the lower face of the timber 15, and the force exerted onthe upperY endsof the dogs by the timber15 tends to rotate them about the shaft 43 t-o cause their lower edges to become engaged firmly with the angle'16, thus loch?` ing the shore in extended position. In the further lmodification of my invention illustrated in Fig. 9, the lower end of the timber 15 has secured to it a dog carrier 50.

The dog carrier 50 is provided with a downwardly extending lugl 51through which there extends a shaft 52 serving as a support fer pairs of dogs 53, the edges of these dogs engaging the inner faces of the angle 16 sim larly to the manner in which the dogs in previously described modifications opera-te. The cross bra-ce 54 which I employ in this mod# iiication of my invention has the flanges 26 In the operation of the deviceillustrated in Fig. 9, the timber 15 is raised by pressure applied to the cross brace 54. As the cross brace moves upward relative to the dogs 53,

which upward movement is provided for by reason 'of theslot, 55, the bosses 56 engage the dogs 53 and force them into Contact with the inner faces of the angles 16. Upon re. lease of the raising force the cross'brace 54 drops downward to a position limited bythe lengt-h of the slot 55, thus disengaging the Y bosses 56 from the dogs 53. This disengagement, however, does not effect the release of of the 4dogs from the angles, for the downward force transmitted to the dogs from the.'

. posite the free ends er filiere-part, a i

Jtimber l5 tends to force the lo\\'er edges of the dogs outward into more firm enoagement with the angles.

ln all the modifications of' my invention described it will be noted that the dogs are pivotally interconnected on an ai-:is disposed above the level at which the edges of the dogs engage the angles. Thus the downward force which the timber l5 exerts on the flows, either directly as in the modification of the invention shown in Figs. 'T and 8 or indirectly as in the other modifications, tends to spread the lower edges of the dogs apart thus increasing the pressure which they exert on the faces of the angles 5. This pressure never operates to spread the angles 16 apart, for any tendency of such angles to spread is opposed by the flanges Q6 of the cross tie l claim as my invention:

l. in adjustable shore, comprising an inner shore-part, a hollow base within which said inner shore-part is slidable, said base ineluding` longitudinally extending structural members disposed at the corners of said inner shore-part to serve as ,guides therefor, a mem ber movable longitudinally of said base, said member extendingv transversely of said base and projecting` outwart between the structural members on opposite sidesof said base, and one or more pairs of locking dogs pivotally attached to said movable member Within said base and adapted to have their ree ends bear against the inner surfaces of said structural members, said movable member being provided wit i flanges lying` against the outer surfaces of said stru-starai members opof' said dogs.

shore, comprising' an inlollow base within which -part is slidable, said base incliuling` longitudinally extending structural membe disposed at the corners of sail inner shore-part to serve as guides therefor, a member movable longitudinally of said base, and one or more pairs of locking dogs pivotf ally attaehed to said movable member within said base and adapted to have their free ends bear against the inner surfaces of said structural members. Y

An adjustable shore, comprising inner and outer teleseoping parts,l means for loolingi' said parts in extended relatiomsaid means incl iding one or more pairs of pivotally mounted dogs the free ends of said dogs be An adjustable said inner sho i.. ing` sharp-edged and adapted to engage inner surfaces ofsaid outer part, eaeli of said dogs iter-,iigg disposed so that a line through its ze and its axis of pivotal mounting' makes i the shore axis an angle greater than 4:50,

- and means tendina' to move said dogs to cause a l a part longitudinally slidable in s il lv i n l said base being provided with tivo site n lon- ,ejitudinally extending flanpgeaiiieuns for loilo ing said hase and said part in extended rela.- tion, said looking' means including one or more pairs of dogs pivotally mounted between said flanges, the free ends of s@ l dons being` adapted to engage said flanges and lo ziert an out fard p `ire thereon, and means tending to move sino doos to cause e ment of their free ends with said flung' s.

5. An adjustable shore, comprising` a base, .a part longitudinally slidable in said base, saidbase being provided with two spaced longitudinally extending flanges, means for locking said base and said part in extended relation, said locking means including one or more pairs of dogs pivo'tallL mounted between said flanges, the freeends of said dogs being adapted to engage said flange and to exert an outward pressure thereon` and Vmeans longitudinally movable with said dogs for cooperating with said flanges to prevent their separation under the forces exerted by said dogs.

6. An adjustable shore, comprising' a base, a part longitudinally slidable in said base, said base being), provided with two spaced longitudinally extending flanges, means for locking said base and said part in extended relation, said locking means includingV a member slidable longitudinally of said base, and one or more pairs of dogs pivotally mounted on said member between said (flanges. the free ends of said dogs being adapted to engage said flanges and to exert an outward pressure thereon, said membehaving portions adapted to bear against the outer surfaces of said flanges to prevent their separation under the forces exerted ,by said dogs.

7. An adjustable shore, comprising' a base, a part longitudinally slidable in said base, said base being provided with two spaced longitudinally extending flanges, means for locking said base and said part in extended relation, said locking means including one or more pairs of pivotally mounted dogs, the free ends of said dogs being adapted to engage said flanges and to exert an outward pressure thereon, and means tendingto move said dogs to Cause engagement of their free ends with said flanges.

8. An adjustable shore, comprising two part-s movable longitudinally relative to each other, one of said parts being,- provided with a longitudinally extending flange, a member movable with the other of such parts, and a pivotally mounted locking dog longitudinally movable with said member and having a free end adapted to engage one side of said flange to hold the shore-parts extended, said member having` a portion bearing against the opposite side of said flange to prevent distortion thereof under the force exerted on said flange by said dog.

9. An adjustable shore, comprising an inner shore-part, a hollow base within which said inner shore-parts is slidable, said base including longitudinally extending angle irons disposed at the corners of said inner shore-part to serve as guides therefor, two locking dogs longitudinally movable with said inner shore-part and pivotally mounted vwhereby their free ends may engage the inner surfaces of oppositeV angle irons, and means longitudinally movable with said dogs for preventing separation of said angle irons.

10. An adjustable shore, comprising an inner shore part, a hollow base within which said inner shore-part isV vertically slidable,

1 5 and means for locking said inner shore part in extended position in said base, said means including a horizontally disposed pivot pin, members pivotally mounted on said pivot pin, means tending to force the lower ends of said members outward, and means connecting said pivot to said innershore part for movement therewith, whereby downward pressure on said inner shore part acting through said pivot pin will tend to force the lower ends of said members apart. l

l1. An adjustable shore, comprising two parts movable longitudinally relative to each other, one of said part-s being provided with a longitudinally extending flange, a member Y movable with the other of said parts and having a portion bearing against one side of said flange, and a movable member acting against the lopposite side of said flange and exerting a clamping actionthereon to hold the two telescoping parts in extended relation. V

In witness whereof, I have hereunto set my hand at indianapolis, Indiana, this 6th day of September, A. D. one thousand ninehun- 40 dred and twenty-seven.

HUGH J( BAKER. 

